Machine for compressing lock-nuts and the like



A. B. CHADWICK.

MACHINE FOR COMPRESSING LOCK NUTS AND THE LIKE.

APPLICATION FILED AUG.Z4, 1918.

1,391,170, PatentedSep t. 20,1921.

5 SHEETS-SHEET I.

A. B. CHADWICK.

MACHINE FOR COMPRESSING LOCK NUTS AND THE LIKE.

APPLICATION FILED AUG-24,19l8.

PatentdSept. 20,1921

5 SHEETSSHEET 2.

A. B. CHADWICK.

MACHINE FOR COMPRESSING LOCK NUTS AND THE LIKE.

APPLICATION FILED AUG.24 1918. I I

Patented Sept. 20, 1921.

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PRESSING LOCK NUTS AND THE LIKE.

ION FILED AUG.24. I918.

Patented Sept. 20, 1921.

5 SHEETS-SHEET 4.

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MACHINE FOR COMPRESSING LOCK NUTS AND THE LIKE.

APPLICATION-FILED AUG.24, 1918- 1,391, 170. I PatentedSept. 20, 1921.

5 SHEET HEET 5.

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' FOR COMPRESSING LOCK-NUTS AND THE 1mm Specification of Letters i'atent. P t nt sqit, 20, 1921,

Application filed August 24, 1918. Serial No. 251,264.

To all whonfhitmy com-em:

Be it knownthat I ARTHUR B. CHADWIGK, a citizen of the Umted States, residing at South Whitley, in the county of Whitley and State of Indiana, have invented certain new and useful Improvements in Machines for Compressing Lock-Nuts and the like, ofwhich the following is a description.

My invention belongs to that general. class of devices designed to cobperatewith other devices in: the manufacture'of lock nuts to roduce the finished product. It is particuarly designed to automatically app sure to the nuts at some stage oftheir manufacturegand socontrolling said pressure that 'gbejtreatment shall be uniform toall ofthe 1 -'fim:s passing through the machine. It is thus designed and is efi'ectively'used in the manufacture of that type of lock nuts where the nut is substantially formed, and thereafter suflicient pressure is applied to bring about a slight modification of one or more of the threads in the nut by means of which it is caused to more firmly engage with the cooperatingbolt by reason of the increased frictional engagement of the parts.

It hasfor its object a novel and effective device of-tho character described which shall be simple and exact, as well as automatic in its operation.

Tothis end my invention consists in the novel construction, arrangement and combination of parts herein shown and described and more. particularly pointed out .in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a side elevation'of one form of my improved device;

, Fig. 2 is a sectional view thereof taken on line 2-2 of Fig. 1; Fig. 3 is a sectional view taken substantially on line 3-3 of Fig. 2; 45 Fig. 4 is a transverse view taken on line 4-4: of F 3;

Fig. 5 is a sectional view taken substantially on line 55 of Fig. 4;

Fig. 6 is a sectional view taken substantially on line 66 of Figs. 1 and. 3; and

Fig. 7 is aside view of a treadle and connecting part shown at the bottom of Fig. 1.

In the drawings, 1 represents a suitable base supporting arotatable vertical shaft 55- 2 in suitable bearings. Upon the upper or point #where' y presseveral openings 4 except atthe articular point where the nuts are to be ischarged into a chute 7, or equivalent part,and at the nuts." One or more inclined chutes 8 convey the nuts from the receptacle 9-downward and dischargethem -:into the openings 4,: there to each I being one of suchdelivery 4 chutes row of receptacles or ockets in the series concentrically arranged about the center of the late 3. Automatic means are employed to eliver the nuts to the lower end of the chute as desired.

Arranged transversely across the machine is a compressing bar 10, which at its ends 1s supported upon resilient means 11, and near its center supports at one end a depressible bar 12 extending at right angles thereto, which at its free end is guided by the perpendicular bar 13 provided with a spring 14 (Figs. 2 and 3). The bar 12 extends radially from near the center of the plate 3 outwardly in alinement with a series of the openings 4 during the measured or step by step rotation of the plate 3. A ram or deflecting bar 14: is carried above the bar 12 by guides or housing 15 (Fig. 1).

The bar 14" is caused to reciprocate in a vertical direction by connection with an eccentric 16 mounted on the shaft 17. A link 18 extends from the eccentric and is pivotally connected to the ram at 19. This portion of the device is very similar to a well known type of punch press in general use.v The reciprocatlon of the ram brings the lower face thereof downward upon the cross bar 12 at each movement with a tendency to press the bar 12 downward upon the nuts at that moment arranged therebeneath.

Provision must be made for a firm bearing or anvil arranged beneath the nuts which are to be compressed, and as the nuts or the bars from which they are constructed, vary slightly as to thickness, and at the same time the amount of deflection must be equally gaged so as not to deflect the nut too much, this support in my improved device is arthe-pressureiis applied/to the ranged to automatically adjust itselfto the precise thickness of the nut to secure the exact and same amount of deflection in all the nuts.

The referred means employed to accomplish tl iis action is more clearly illustrated in Figs. 2 and 5 As shown, it will be seen that an anvil block 20 is maintained in position beneath each nut to. be compressed. Each anvil block slidingly rests upon a reciprocating wedge-shaped bar 21, which is guided in its movement in any preferred manner. As shown in Fig. 2, a mortise engagement at the bottom of the block as at 22 serves to keep the several bars in proper alinement with the block 20. As shown in F i 5, the bars 21 have arranged at either en thereof resilient connections which cause them when moving in one direction to lift the block 20 upward against the nut, bringin the latter in contact with the bar 12. W lhen the com ression is completed the bar 12 is released y the upward movement of the ram, the resilient connection at the opposite end forces the bar 21 backward, permitting the block 20 riding thereon to move downward slightly to clear the plate 6, and makin ample 'rovision for the reciprocation 0 the next nut. As clearly shown in Figs. 1 and 2, a shaft 22 is driven by sprocket 23 or equivalent means actuated by a chain 24-, which at itsupper end is carried by a sprocket mounted on the shaft 17. As shown in Fig. 5, this shaft 22 has mounted upon it a cam 25 for each of the wedge bars 21. A movable bar 26 is mounted in guides 27-28, and has secured at one end a rolleror anti-friction device 29 cotiperating with the cam 25. A sprin 30 is mounted in the guide 28, at one en bearing against the movable bar 26 and at the other end against the wedge bar 21 which is thus pushed forward in a resilient manner at each rotation of the cam 25. Upon the opposite end of the bar 21 is a longitudinally movable bar 31 mounted in a proper guide 32. The opposite end of the bar 31 engages with the wedge bar 21 as at 32. A spring 33 is carried loosely on the bar 31 between a shoulder 34 on the guide 32 and the end of the bar 21. Thus as the bar is forced forward to lift the anvil block upward, the spring 33 is retracted under the positive force of the cam action. 'However, as the cam rotates to permit the bar. 26 to be released from this action, the spring 33 forces the bar 21 backwardly as described, permitting the anvil block 20 to drop slightly from its operative position to clear the plate 6.

As shown in Fig. 3, the nut chutes 8 are provided with automatic means to periodically release the nuts carried therein so that they may be delivered to the plate singly or one at a time and thus not load it'up so as to interfere with its operation.- Any pre' As the oscillating lever 35 is forced down- Ward, the pin 38 enters-into the bolt hole of the nut 5 beneath the same, holding all of the nuts back of that one'in place, and the end .of the lever moves downward gradually lifting the extension 37 until the first nut is released and moves downward and is delivered from the end of the chute. The reverse movement brings the parts back to their normal position as shown in Fig. 3. A link 39 connects the end of the lever 35 to the end of a reciprocating plunger 40, which is Y mounted on an extending arm 41 rigidly secured tothe reciprocating ram 14. In the preferred construction a nut 42 is mounted upon the upper end of the rod 40, and a spring 43 is positioned on the rod between t e nut and the arm 41. A similar nut 44 may be secured'upon the rod 40 below the arm 41 and a spring 45 mounted thereon. This secures a resilientaction of the lever 35 so that in case the pin 38 does not properly engage the nut 5, or any other obstruction occurs, the parts will not be broken.

Referring to Figs. 3 and 6, a shaft 46 is driven by a sprocket 47 and a chain 48 extending upward and mounted upon a sprocket carried upon the shaft 22 or by equivalent means. A cam 49 is mounted upon the shaft 46, and in its rotation reciprocates a bar 50 having upon its end an anti-friction roller 51 contacting with the cam.' Referring to Fig. 6, it will be seen that the bar 50 carries an extending arm 52 provided with a spring pawl 53 coiiperating with a ratchet 54 fixed to the end of the shaft 2. The opposite end of the bar 50 is supported in an suitable manner by a bearing 55 which it slidably engages, and a spring 56 is mounted between said bearing 55 and a collar 57 carrried on the bar 50. It will thus be seen that at each rotation of'the shaft 46 the bar 50 is reciprocated, rotating the shaft 2 by means of the ratchet in a step b step motion, the spring 56 returning the s aft 50 to its normal position as the cam releasesit.

From this description it will be seen that the action is as follows: Assuming that the machine is read for use with the nuts in the several gui e chutes 8 as indicated in Fig. 3, the plate 3 on the shaft 2 will be me e .m a step by step movemen wh e the ram 14 will be regularly reciprocated by reason of the continuous rotation of the shaft 17 and the cam carried thereon. The

initial downward movement releases the lowermost nut inthe chutes 8 which by so timed for that purpose. As the plate 3 continues to rotate in a step by step movement as described, nuts will be successively deposited in the radiall arranged openings 4 therein. When t e nuts first positioned in the plate reach a point over. the anvil block 20, at which point the plate is cut away, the nuts drop through the plate and for the moment rest u on the blocks 20 and beneath the bar 12.. t this moment the wedge blocks 21 are moved forward,v lifting the anvil blocks'upward and resili-v ently pressing the nuts against the bar 12," while at the same time forming a solid foundation for the pressure of the ram. The descending ram contacts with the upper face of the bar 12 and presses the same downward a distance gaged by the-eccentricdriving the same.

The several wedge bars 21 being'inde pendently driven forward and resiliently cushioned as stated, each brings the nut above it upward in positive contact with the compression bar 12, independently of the operation of the other wedge bars, so that the compression and deflection in the several nuts is exactly the same and brought about simultaneously by the action of the ram.

Referring to Fig. 5, it will be seen that the upper surface of the anvil block at this moment is slightly above the upper surface of the plate 6. It is lifted to this position after the plate 6 has come to a rest and the nut has dropped through the opening in the plate 6 upon the upper surface of the anvil block 20, which normally is slightly below the lower face of the plate 6. After the nuts have been compressed, the wedge bars begin to move backward, and at the moment the upper face of the anvil block comes slightly below the lower face of the plate 6, the plate moves forward in its next action and the nuts are swept upon the upper surface of the plate and thus carried about until they are finally dropped through the plate at the point marked 58 into theslide 7 where they are conveyed to suchpoints as may be desired.

As before mentioned, the reciprocating portion of this machine and its connecting parts are similar to a well known type of punch press now in general use. In such punch presses, the outline of which is shown in the drawings, the operation of the ma chine is usually controlled by a foot lever. By means of the foot lever the machine may .be caused to operate continuously, maintaining in the. present device the step by step 0 erationo s 0 inc may be'stoppedforan desired purpose. In1Fi'g: 1 sucha" foot. ever is shown The usual connection is; made beas at a. tween the foot, lever with any preferred form of clutch mechanism (not shown) by means'of which the operation of the machine may be controlled.

As shown in Figs. 1 and 7, a retainingand is device 0 is arranged with a hook pivotally supported at r so that if desired when the foot lever is depressed the hook may 'enga e the shank of the foot lever, as shown in ig. 7, and maintain the same in that position until it is desired to release it. This may be readily done by pressing downward on the extension .9 connected with the engaging means which. will withthe rotating plate, .or the ma.-

draw the hook'from over the shank of the foot lever and release the same..

Having thus described my invention,it is obvious that various immaterial modifica tionsma bemade-in the same without departin romthe spirit of my invention .as define in the appendedclaims; hence I do not wish to be understood as limiting myself to the exact form construction, arrangement and combination of parts herein shown and described, or uses mentioned.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a machine of the kind described, a compressing element, a cooperating reciprocating part arranged to depress said ele ment, and mechanism for reciprocating said part, in combination with a movable anvil block arranged beneath the compressing element, and means for moving said anvil to operative position to support a nut between said element and the block during the compression operation.

2. In a machine of the kind described, a compressing element, a cooperating reciproeating part arranged to depress said element, and mechanism for periodically reciprocating said part, in combination with a movable anvil block arranged beneath the compressing element, and means timed with the reciprocation of said reciprocating part for moving the anvil block to operative position to support a nut between said element and the block during the compressing operation.

3. In a machine of the kind described, a compressing element, a cooperating reciprocating part arran ed to depress said element, and mechanism or periodically reciprocating said part, in combination with a movable anvil block arranged beneath the compressing element, means timed to the reciprocation of said part for elevating the anvil block to support a nut between said element and the block. during the compressing'operation of the reciprocating part, and means for deliverin a nut upon said anvil block in position to e acted upon, substantially as described.

4. In a machine of the kind described, a

operation.

5. In a machine of the kind described, a compressing element, a cooperating reciprocating part arranged to depress said element, and mechanism.for reciprocating said part, in combination with a movable anvil block arranged beneath the compressing element, and automatic means timed to the reciprocation of said part for moving the anvil block to a position to support a nut between said compressing element and the block during the compressing operation.

6. In a device of the kind described, a compressing element, a cooperating reciprocatmg part arranged'to depress said element, and mechanism for reciprocating said part, a movable anvil block arranged beneath the compressing element, and automatic means for moving the anvil block to support a nut between said element and the block during the compressing-operation, in combination with a rotating plate having formed therein one or more cells adapted to receive a nut, means for rotating said plate to bring the nut coincidentally beneath the compressing element in time to-be operated upon thereby, and means for discharging the nut operated upon during the reverse movement of the reciprocating part and bringing another nut in position to be operated upon as the reciprocating part again descends to operative position.

7. In a machine of the kind described, a compressing part, means for periodically operatlng said part, and an anvil block beneath the compressing part, in combination with a rotating plate operated by a step by step motion, one or more cells formed in said plate to receive.nuts,a stationary plate arranged beneath said rotating plate to 'form a floor for said cells cut awa at a point above said anvil block to'permlt the nuts to drop thereon, and means for discharging the nuts operated upon, substantially as de-' scribed.

8. In a device of the kind described, a vertically movable anvil block and means for maintaining the same in relative operative position, in combination with a longitudinall movable elevating block upon which t e anvil block is slidably mounted, means for resiliently forcing said elevating block beneath said anvil block to bring the latter into operative position, and means for thereafter moving said elevating block backward to bring the parts to their normal positions.

9. In a machine of the kind described, a vertically movable anvil block, means for maintaining the same in operative position, a longitudinally movable elevating block upon which the anvil block is slidingly mounted, means for longitudinally moving the elevating block forward and backward to alternatel elevate the anvil block to operative position and then let it recede, a cooperative compression member arranged above the anvil block, and means for periodically applying operative pressure thereto to compress a nut between the said member and the block, in combination with a plate rotating between the same .member and anvil block having formed therein open cells for the reception of bolt nuts, a fixed plate forming a bottom for the cells but open about the anvil block, and mechanism for rotating the cell plate step by step to present the nuts therein between the compression member and the anvil block.

10. In amachine of the kind described, a series of vertically movable anvil blocks, means for maintainin the same in operative position, means for e evating the blocks periodicall a cooplerating compression bar arrange above t e blocks and means for periodically applying operative pressure to said bar to compress bolt nuts positioned between the bar and the anvil blocks, in combination with a fixed. horizontal plate ex-.

tending with its upper face substantially in line with the top face of the anvil blocks when the latter are in inoperative position and having openings formed therein within which the upper part of the anvil blocks protrude, a rotating late above the fixed plate having a plura ity of series of nut cells formed therein so arranged that as the plate is rotated the series of nut cells will be successively brought into alinement with the anvil blocks, and mechanism for rotating the said plate step by step, substantially as described.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

. ARTHUR B. CHADWICK. Witnesses:

JoHN W. HILL, CHARLES 1. Conn. 

